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Finding the Fourth Proportional to 115,246.80, 172,870.20 and 108,685.80

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Solution

The fourth proportional to 115,246.80, 172,870.20 and 108,685.80 is: 163,028.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,246.80 : 172,870.20 = 108,685.80 : x
  2. Step 2: Convert to fraction form
    115,246.80/172,870.20 = 108,685.80/x
  3. Step 3: Cross multiply
    115,246.80x = 172,870.20 × 108,685.80
  4. Step 4: Simplify right side
    115,246.80x = 18,788,535,983.16
  5. Step 5: Solve for x
    x = 18,788,535,983.16/115,246.80
  6. Step 6: Final answer
    x = 163,028.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.